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-rw-r--r--usr.sbin/tcpdump/print-bgp.c71
1 files changed, 45 insertions, 26 deletions
diff --git a/usr.sbin/tcpdump/print-bgp.c b/usr.sbin/tcpdump/print-bgp.c
index 8baaec38995..631ae1bf2f1 100644
--- a/usr.sbin/tcpdump/print-bgp.c
+++ b/usr.sbin/tcpdump/print-bgp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: print-bgp.c,v 1.2 2000/04/26 21:35:39 jakob Exp $ */
+/* $OpenBSD: print-bgp.c,v 1.3 2000/10/03 14:15:55 ho Exp $ */
/*
* Copyright (C) 1999 WIDE Project.
@@ -40,6 +40,7 @@
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
+#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
@@ -281,7 +282,7 @@ decode_prefix4(const u_char *pd, char *buf, int buflen)
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%d", getname((char *)&addr), plen);
+ snprintf(buf, buflen, "%s/%d", inet_ntoa(addr), plen);
return 1 + (plen + 7) / 8;
}
@@ -317,6 +318,9 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
int tlen;
const u_char *p;
char buf[256];
+ u_int16_t ss;
+ u_int32_t ll;
+ struct in_addr aa;
p = dat;
@@ -343,8 +347,9 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
printf("confed");
printf("%s", (p[0] & 1) ? "{" : "");
for (i = 0; i < p[1]; i += 2) {
+ memcpy((void *)&ss, (void *)&p[2+i], sizeof(ss));
printf("%s%u", i == 0 ? "" : " ",
- ntohs(*(u_int16_t *)&p[2 + i]));
+ ntohs(ss));
}
printf("%s", (p[0] & 1) ? "}" : "");
p += 2 + p[1] * 2;
@@ -353,15 +358,19 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
case BGPTYPE_NEXT_HOP:
if (len != 4)
printf(" invalid len");
- else
- printf(" %s", getname(p));
+ else {
+ memcpy((void *)&aa.s_addr, (void *)&p[0], sizeof(aa.s_addr));
+ printf(" %s", inet_ntoa(aa));
+ }
break;
case BGPTYPE_MULTI_EXIT_DISC:
case BGPTYPE_LOCAL_PREF:
if (len != 4)
printf(" invalid len");
- else
- printf(" %u", (u_int32_t)ntohl(*(u_int32_t *)p));
+ else {
+ memcpy((void *)&ll, (void *)&p[0], sizeof(ll));
+ printf(" %u", (u_int32_t)ntohl(ll));
+ }
break;
case BGPTYPE_ATOMIC_AGGREGATE:
if (len != 0)
@@ -372,8 +381,9 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
printf(" invalid len");
break;
}
- printf(" AS #%u, origin %s", ntohs(*(u_int16_t *)p),
- getname(p + 2));
+ memcpy((void *)&ss, (void *)&p[0], sizeof(ss));
+ memcpy((void *)&aa.s_addr, (void *)&p[2], sizeof(aa.s_addr));
+ printf(" AS #%u, origin %s", ntohs(ss), inet_ntoa(aa));
break;
case BGPTYPE_COMMUNITIES:
if (len % 4) {
@@ -382,7 +392,8 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
}
for (i = 0; i < len; i += 4) {
u_int32_t comm;
- comm = (u_int32_t)ntohl(*(u_int32_t *)&p[i]);
+ memcpy((void *)&ll,(void *)&p[0+i],sizeof(ll));
+ comm = (u_int32_t)ntohl(ll);
switch (comm) {
case BGP_COMMUNITY_NO_EXPORT:
printf(" NO_EXPORT");
@@ -401,7 +412,8 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
}
break;
case BGPTYPE_MP_REACH_NLRI:
- af = ntohs(*(u_int16_t *)p);
+ memcpy((void *)&ss, (void *)&p[0], sizeof(ss));
+ af = ntohs(ss);
safi = p[2];
if (safi >= 128)
printf(" %s vendor specific,", af_name(af));
@@ -423,16 +435,18 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
tlen = p[0];
if (tlen) {
printf(" nexthop");
- if (af == AFNUM_INET)
- advance = 4;
#ifdef INET6
- else if (af == AFNUM_INET6)
+ if (af == AFNUM_INET6)
advance = 16;
+ else
#endif
+ advance = 4; /* AFNUM_INET */
for (i = 0; i < tlen; i += advance) {
- if (af == AFNUM_INET)
- printf(" %s", getname(p + 1 + i));
+ if (af == AFNUM_INET) {
+ memcpy((void *)&aa.s_addr, (void *)&p[1+i], sizeof(aa.s_addr));
+ printf(" %s", inet_ntoa(aa));
+ }
#ifdef INET6
else if (af == AFNUM_INET6)
printf(" %s", getname6(p + 1 + i));
@@ -455,12 +469,12 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
printf(" NLRI");
while (len - (p - dat) > 0) {
- if (af == AFNUM_INET)
- advance = decode_prefix4(p, buf, sizeof(buf));
#ifdef INET6
- else if (af == AFNUM_INET6)
+ if (af == AFNUM_INET6)
advance = decode_prefix6(p, buf, sizeof(buf));
+ else
#endif
+ advance = decode_prefix4(p, buf, sizeof(buf));
printf(" %s", buf);
p += advance;
@@ -469,7 +483,8 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
break;
case BGPTYPE_MP_UNREACH_NLRI:
- af = ntohs(*(u_int16_t *)p);
+ memcpy((void *)&ss, (void *)&p[0], sizeof(ss));
+ af = ntohs(ss);
safi = p[2];
if (safi >= 128)
printf(" %s vendor specific,", af_name(af));
@@ -481,12 +496,13 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
printf(" Withdraw");
while (len - (p - dat) > 0) {
- if (af == AFNUM_INET)
- advance = decode_prefix4(p, buf, sizeof(buf));
#ifdef INET6
- else if (af == AFNUM_INET6)
+ if (af == AFNUM_INET6)
advance = decode_prefix6(p, buf, sizeof(buf));
+ else
#endif
+ advance = decode_prefix4(p, buf, sizeof(buf));
+
printf(" %s", buf);
p += advance;
@@ -512,7 +528,7 @@ bgp_open_print(const u_char *dat, int length)
printf(": Version %d,", bgpo.bgpo_version);
printf(" AS #%u,", ntohs(bgpo.bgpo_myas));
printf(" Holdtime %u,", ntohs(bgpo.bgpo_holdtime));
- printf(" ID %s,", getname((char *)&bgpo.bgpo_id));
+ printf(" ID %s,", getname((const u_char *)&bgpo.bgpo_id));
printf(" Option length %u", bgpo.bgpo_optlen);
/* ugly! */
@@ -542,6 +558,7 @@ bgp_update_print(const u_char *dat, int length)
int len;
int i;
int newline;
+ u_int16_t ss;
memcpy(&bgp, dat, sizeof(bgp));
hlen = ntohs(bgp.bgp_len);
@@ -549,13 +566,15 @@ bgp_update_print(const u_char *dat, int length)
printf(":");
/* Unfeasible routes */
- len = ntohs(*(u_int16_t *)p);
+ memcpy((void *)&ss, (void *)&p[0], sizeof(ss));
+ len = ntohs(ss);
if (len) {
printf(" (Withdrawn routes: %d bytes)", len);
}
p += 2 + len;
- len = ntohs(*(u_int16_t *)p);
+ memcpy((void *)&ss, (void *)&p[0], sizeof(ss));
+ len = ntohs(ss);
if (len) {
/* do something more useful!*/
i = 2;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 01:28:19 +0000